She was later transferred to James Cook University Hospital for treatment and was released that day.

The attacker, who was with two other men - neither of whom intervened - is white, of medium build, 5ft 9ins, 19-20, with very short brown hair. He was wearing a thick white and blue striped Fred Perry jumper and dark denim jeans.

Another man is of Asian appearance, 5ft 9ins, medium build with short brown shaved hair. He is in his early 20s and was wearing a pink Fred Perry top. The third man is white, aged 19-20.

Anyone with any information is asked to contact PC Christopher Houseman on 01642 302626.